I just installed CHDK and it looks great. I'm using the 780is which I'm not sure is a stable build yet. Just playing around with it, I'm finding that it crashes on some basic scripts. If I start the metronome script from the sample, it crashes as soon as the script starts.
I get to "press set to start"
I press it
I get "press menu to end"
then the camera goes totally dark and if I press menu nothing happens.
I reformatted the card and reinstalled everything and I'm getting the same result.
I seem to be able to use the TV Mode universal script in the sample scripts.